Sergey Sedov

Sergey Alexandrovich Sedov (; born 1979), known as The Sokolniki Maniac (), is a Russian serial killer who stabbed to death six people in Moscow's Sokolniki Park between 1998 and 1999. Deemed mentally unfit to stand trial, he was sent off to a psychiatric facility in the village of Troitskoye, where he remains to this day. Provided by Wikipedia